You're in luck. If you turn off page shuffling you can drag up to 10 pages together into a single spread (so make a new, non-facing doc with pages sized to match your panels), then you can select all on each of your two original spreads and paste in place on your new file, then turn on shuffling and arrange into the correct order.
Thanks I might have explained this wrong. I have two spreads that are 9 panels each. I want to create a new PDF of single pages (each panel as a single page) to post on website as a PDF.
Right, I understood that. You need to make a new 18-page document, with the page size being the same as a single panel in the existing file.
Turn off shuffling and you can drag those 18 pages into two 9-page spreads, at which point you can copy the content from the original file and paste it into the new 9-page spreads. Even though they look the same on your screen, the new file has 18 single pages and will export as such.
You can of course.
Setup a blank document - and setup spreads
Facing Pages ticked off
Size - same size as 1 individual panel.
In the pages panel toggle the Document Pages Shuffle to be off (submenu top right of the Pages panel)
The drag each page beside each other (they should ‘click’ into place).
You should have 9 spreads.
Duplicate these blank pages.
File>Place and choose your original InDesign document.
Place it over all the spreads.
File>Export and choose PDF (but don’t tick Spreads). You want individual PDF pages.
That should do it.
Thanks so much between the two answers it finally kicked in!